The distribution characteristics of optical field of high-order Bessel beam after pasing through the cylindrical lens were studied. Based on the generalized Huygens Fresnel diffraction integral theory, the expression of the diffractive light intensity distribution of which the high-order Bessel beam passing through cylindrical lens was derived. And the intensity distribution in different propagative distances was numericaly simulated by MATLAB and MATHCAD. In the experiment, the high-order Bessel beam was generated by axicon lens and spiral phase plate, and passed through the cylindrical lens. The optical intensity distribution in different propagation distances was captured by a CCD camera. The study results show that, a high-order Bessel beam through the cylindrical lens can form a lip-shaped caustic optical beam.